Environmental nitrogen analysis. Technician preparing gas chromatograph samples for nitrogen gas analysis to estimate denitrification rates. During denitrification,microbes remove nitrate from shallow groundwater. The levels of carbon and nitrogen are a critical factor in assessing soils and the crops grown on them. This research is being carried out by the Agricultural Research Service of the US Department of Agriculture | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Greb, Peggy / US Department of Agriculture |
Bildgröße: | 3668 px × 2394 px |
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